Reply To: Sight Reduction 229 Interpolation tables

[Tyler Szwarc]

Del,

Glad I was able to help. As for the N.A. sight reduction tables, I don’t have much experience using them. I use 229 to find Hc, Zn and d, and then I use a table from 249 to calculate the declination correction.

This table can be found here:
https://thenauticalalmanac.com/TABLE%205-%20Correction%20to%20Tabulated%20Altitude%20for%20Minutes%20of%20Declination.pdf

This table rounds the declination correction to the nearest 1′, but to me the ease of use is worth the minor loss of precision.

Tyler